Returns real-time drive-up and reservable vehicle space available at WSF terminals for upcoming sailings. Use for "will I make the ferry?" or "how full is the next sailing?" questions. Optionally filter to a specific terminal by ID (use wsdot_get_ferry_terminals for the ID). DriveUpSpaceCount is ...
Part of the Wsdot Mcp Server server.
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AI agents call wsdot_get_terminal_space to retrieve information from Wsdot Mcp Server without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though wsdot_get_terminal_space only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"wsdot_get_terminal_space": {}
}
}See the full Wsdot Mcp Server policy for all 12 tools.
These attack patterns abuse exactly the kind of access wsdot_get_terminal_space gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Returns real-time drive-up and reservable vehicle space available at WSF terminals for upcoming sailings. Use for "will I make the ferry?" or "how full is the next sailing?" questions. Optionally filter to a specific terminal by ID (use wsdot_get_ferry_terminals for the ID). DriveUpSpaceCount is the key field — zero means the drive-up lane is full.. It is categorised as a Read tool in the Wsdot Mcp Server MCP Server, which means it retrieves data without modifying state.
Register the Wsdot Mcp Server MCP server in PolicyLayer and add a rule for wsdot_get_terminal_space: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Wsdot Mcp Server. Nothing to install.
wsdot_get_terminal_space is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the wsdot_get_terminal_space rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for wsdot_get_terminal_space. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
wsdot_get_terminal_space is provided by the Wsdot Mcp Server MCP server (@cyanheads/wsdot-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 12 Wsdot Mcp Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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